Definitions for impregnable

Not capable of being stormed or taken by assault; unconquerable; as, an impregnable fortress.

Difficult or impossible to overcome or refute successfully; beyond question or criticism; as, an impregnable argument.

Learn something new every day

GET OUR

Word of the Day email

Thank youfor signing up

Get the Word of the Day Email

Citations for impregnable

During this destruction the villagers . . . relied on their ancient instinct for survival and retreated to the impregnable fortress of the mountain.Suheil Bushrui and Joe Jenkins, Kahlil Gibran: Man and Poet

What Spinoza says of laws is equally true of party-platforms,--that those are strong which appeal to reason, but those are impregnable which compell the assent both of reason and the common affections of mankind.James Russell Lowell, The Atlantic

Origin of impregnable

late Middle English

1400-1450

Impregnable is from Old French, from the prefix im-, "not" (from Latin in-) + prenable, "able to be taken or captured," from prendre, "to take," from Latin prehendere.